Ceiling Cassette 875 Air Throws; Airflows Outdoor / Ducted Units; Fresh Air Supply - Marstair CC 875 Technical Manual

CEILING CASSETTE 875 AIR THROWS

AIRFLOWS OUTDOOR / DUCTED UNITS

Model
MCU+ 60 -
MCU+ 80 -
MCU+ 90 MHPUL(E) 80
MCU+ 100 -
MCU+ 130 MHPUL(E)100
MCU+ 150 MHPUL(E) 150 2840

FRESH AIR SUPPLY

(see page 56 for kit details)
CC 875 units are fitted with an inlet to allow the installer to provide a fresh air supply
The 100mm dia. spigot is available as kit 55200305.
The installer must provide ductwork, a screened source of fresh air and an auxiliary
fan.
The auxiliary fan must be sized to overcome the resistance of the filter, the ductwork
and the cassette itself. (To prevent excessive noise, the maximum fresh air volume
should be less than 5% of the nominal air volume for any given unit and fan speed).
The auxiliary fan should be connected to a separate electrical circuit, appropriately
fused and isolated.
Tel: 01823 665660
Heronhill - for all your Marstair requirements
MIN Speed MAX Speed
3
CFM m /s CFM
1250 0.59 1660
1250 0.59 1660
1440 0.68 2420
1440 0.68 2420
2840 1.34 3690
1.34 3690
www.heronhill.co.uk
Min. Speed
3
m /s Model CFM
0.78 DCUE 60 885
0.78 DCUE 80 740
1.14
Note: On MCU+ and MHPUL the minimum speed
1.14
can fall to zero under fan speed control if the
1.74
ambient temperature is low
(to maintain good operating conditions).
1.74
6
Max. Speed
3 3
m /s CFM m /s
0.42 1115 0.53
0.34 1040 0.48
Fax: 01823 665807